Earth Science Flashcard

Front

What is the gradual movement of Earth's continents over geological time?

Back

Continental Drift

Front

What are the preserved remains or traces of ancient organisms found in sedimentary rock?

Back

Fossil

Front

Which principle states that in undisturbed rock layers, the oldest layers are at the bottom and the youngest are at the top?

Back

Superposition

Front

What scientific theory explains the movement of Earth's lithospheric plates?

Back

Plate Tectonics

Front

What process occurs at mid-ocean ridges where new oceanic crust is formed and moves outward?

Back

Seafloor Spreading

Front

What is an underwater mountain range where new oceanic crust is created due to tectonic activity?

Back

Mid-Ocean Ridge

Front

What phenomenon occurs when Earth's magnetic field reverses polarity?

Back

Magnetic Reversal

Front

What is the semi-fluid layer beneath the lithosphere that allows tectonic plates to move?

Back

Asthenosphere

Front

What is the rigid outer layer of Earth composed of the crust and upper mantle?

Back

Lithosphere